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French Mustard

A spicy-sweet mustard condiment thickened with mustard and vinegar.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 ingredients
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Why it works: Mustard and vinegar are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 14,067 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓

French Mustard

Ingredients

Directions

Prepare

  1. In a bowl, combine black pepper, brown sugar, and salt.

  2. Add enough mustard to thicken the mixture.

  3. Smooth the mustard with a little vinegar, like you would with flour for gravy.

Cook and cool

  1. Place the mixture on the stove and stir until it boils.

  2. Remove from heat and let it cool before using.

Recipe from a historical cookbook (Internet Archive).

Transcribed from a scanned cookbook and modernised for today's kitchens. Where the book gave no heat or time, or said "a moderate oven", the temperatures and times here may be modern equivalents rather than the book's own figures.

Explore the science

The flavor team

The pairs that carry this dish. Each one is judged two ways: how much their aromas overlap, and how often cooks already put them together.

  1. Mustard + vinegartop 7% of all pairs
    Smell alikemoderate
    Cooked together14,067 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  2. Pepper + mustardtop 9% of all pairs
    Smell alikemoderate
    Cooked together15,430 recipes

    Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).

  3. Pepper + vinegartop 14% of all pairs
    Smell alikemoderate
    Cooked together27,814 recipes

    Shared aroma: 4'-methylacetophenone (bitter almond).

  4. Sugar + vinegartop 15% of all pairs
    Smell alikemoderate
    Cooked together20,806 recipes

    Shared aroma: beta-damascenone (apple, rose).

  5. Sugar + mustardtop 19% of all pairs
    Smell alikemoderate
    Cooked together8,424 recipes

    Shared aroma: guaiacol (smoky, sweet).

Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs

What each ingredient does

Mustard
Forms the thick base of the sauce and provides its sharp flavour.
Brown sugar
Adds sweetness that balances the sharpness of the mustard.
Vinegar
Thins the mustard smoothly and adds acidity.

The step that matters

Smooth the mustard with vinegar before cooking. Adding vinegar a little at a time and mixing it in fully before heating prevents lumps, much as a flour slurry is smoothed before gravy is thickened. Lumps that form at this stage will not disappear when the mixture is heated and stirred.

Swap the mustard

How well each one fits the dish's main ingredients (pepper, sugar, vinegar):

  1. Capsicumfits better
  2. Mustardthe original
  3. Cabbagefits less well
  4. Cucumberfits less well

Fit is the average pairing score against pepper, sugar, vinegar. Candidates are from the same food group and used in at least 100 recipes.

“What each ingredient does” and “The step that matters” were written by Claude from this recipe’s own method and reviewed in samples by CompKitchen.

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